tan[2tan^-1 (1/2)]等于多少,tan[2tan^-1 (1/3)]呢?
问题描述:
tan[2tan^-1 (1/2)]等于多少,
tan[2tan^-1 (1/3)]呢?
答
tan[2tan^-1 (1/2)]等于多少,
tan[2tan^-1 (1/3)]呢?